Cullen is a Lego freak. Legos have always been his toy of choice. His favorite sets are the Galactic and Star Wars types. He loves creating faster and deadlier space ships. For his eleventh birthday he’s disappointed when his grandparents give him a Castle set. His Uncle Merlin, also a lego fanatic, adds to Cullen’s confusion by presenting him with figures for the castle: four knights, a lady, a princess and a magician.He decides to build the castle and set up the figures. When he places the magician the castle transforms into real stone. Cullen finds himself standing on the ramparts looking at the land stretched out before him and Merlin, the magician, is addressing him as king. Cullen is about to discover that a spaceship from another galaxy is attacking his kingdom. It is a spaceship that Cullen made.He now has to discover a way to save his people. How can swords defeat lasers? With the help of his father who is a professor of the Middle Ages, and a series of tapestries hanging in the castle they come up with a plan.